Stop device for phonograph-disks.



A. F. IRETON.

STOP DEVICE FOR PHONOGRAPH DISKS.

- APPLICATION FILED MAR. I. 1916.

Patented Mar. 6,1917.

UNITED STATES P T NTo F oE,

ARTI'E 1 IRE'ION, or aic'nmonn, INDIANA, ASSIGNOR o THE STARR PIANO COMPANY OF RICHMOND, INDIANA, A conrona'rlon or INDIANA. I

STOP bEVICE FOB, PHONOGRAPH-DISKSQ To (ZZZ whom it may concern Be it known that I, An'rin F. IRETON, a citizen of the llnited States, residing at Richmond, in the county of \Vayne and State of Indiana, have invented certain new and useful Improvements in Stop Devices to a considerable extent for stopping the 7 disk after it has revolved a definite num ber of times, or when the inner end of the groove of any particular composition has been reached by the stylus, in order that the seal or the smooth portion of the disk at the center may not be traversed by the needle, and the parts otherwise exposed to undue injury or wear.

Myinvention resides in the form, character and mode of operation of the special means which I have devised for this purpose, and which, generally described involves a spring actuated brake adapted when tripped to bear upon the rotating disk or its table, a latch therefor, and a tripping lever in frictional engagement therewith,

the end of which lies in the path of a pin or projection on the swinging portion of the tpne arm, and which may be set at any desiredpoint to be encountered by such'p'in and releases the brake Without interfering hit any other way with the movements -or ofieration of the device as a whole.

Lllhe improvement in its preferred an dspecilic form is illustrated in theace.)iiipanying drawings in which:

li ljigure 1 is a top plan view of my iinprqved brake and so much of a phonograph as is necessary to an understanding ofjits nature and purpose.

i 'l ig. 2 is a side elevation of the same.

,Fig. 3 is another View in elevation of the b1; kc, and portions of the phonograph mechanism. I r I h v selected in illustration oi the iniifprovement a typical form of disk phonograph Specification of Letters Patent.

Patented lllar. 6, 1917.

Application filed March 7, 1916. Serial No. 82,584.

mechanism, including a rotary disk or turn-, table A, a tone arm conu'irising a vertical .portioirB, movable around its axis, and a horizontal portion-C, carrying a sound box I), the latter provided with a stylus E which is placed in the spiral groove .at the edge of the disk and which follows said groove whenv t-hedevice is in operation, swingingthe tone arm from the position illustratedin full lines to that .show' n by. dottedlines in Fig. 1;

Uponthe frame of: the box or cabinet for the instrument there is mounted on a verti: cal pivot pin a lever, one end constructed as 'abrake or braking cushion G, and the other as a handle F for turning it manually. By -means of a spiral spring H, this lever is connected to :1V bar K, pivoted at L," at one end to the lever, and at the other'to an eecentric pin M ona rotary disk l\'. The disk N has a tooth or notch which is adapted to be engaged by.the end of a pivoted latch lever acted upon by a light spring P, w

which has a normal tendency to maintain said lever in engagement with the disk, and when the handle or lever F is turned to the left, Fig. 1, the disk N is partially rotated until its notch. is engaged by the latch lever O. v

-To the lever O at a point beyoiul'its ful cium is pivoted a lever R, \vliich'is in trictional contact through a washer S with said lever, and the end of this lever R extends out into the path of a pin T depending from a. bracket on the vertical portion B of the tone arm, the position of which will obviously depend upon the position of the sound box andstylus with reference to the disk.

Before playing any disk, this lever B is set so that its outer or free end will be encountered by the pin T when the stylus has reached that portion of the disk where it is desired to stop the latter, and when this occurs, the latchlever will be thrown out of engagen'ient with the disk N-alld the brake released, whereupon. the rotation of the turntable is at once arrested. H

If the lever R is not so adj'ustcd, and the i brake set, no action of this kind will take.

Obviously, the underlying principle of.

this mechanism is capable of many other specific embodiments than that herein de scribed, and the invention, in this regard, is not limited.

What I claim is 1. An automatic brake for stopping the rotation of a phonograph disk comprising in combination a spring actuated brake lever, a rotary notched disk, rigidly connected therewith, a latch lever for engaging said disk when turned by the brake lever, a tripping lever in frictional engagement with the atch lever and a pin depending from the rotary vertical portion of the tone arm for engaging the tripping lever.

2. The combination with a phonograph disk or turntable, a brake lever for engagement therewith, a disk pivoted to the frame of the instrument, a connection between the brake lever and an eccentric pivotal point on said disk, :1 spring connection between the brake lever and said connection, means for latching the disk to set the brake and means for tripping the latch when the swinging tone arm has reached a given position.

3.- The combination with a phonograph disk or turntable, a brake lever for engagement therewith, a disk pivoted to the frame of the instrument, a connection between the brake lever and an eccentric pivotal point on said disk, a spring connected to the brake lever and said connection, a latch for engagin and holding the disk in set position, a lever in frictional engagement therewith, and a pin depending from the vertical part of the swinging tone arm to engage with said lever in any position to which it may have been adjusted.

In testimony whereof I hereunto affix my signature in the presence of two subscribing witnesses.

ARTIE F. IRETON.

\Vitnesses:

VALTER G. CRONIN, Anson) E. Prrnrrsa. 

